Fault Code Lookup

HVAC Sales Master
A093_F
Internal control fault detected
This code typically points to
  • Internal board/control fault

Next checks to confirm
  1. Confirm not caused by miswiring or external harness issue
  2. Use contractor app for deeper fault tree

Escalation
Active fault until board/control issue resolved
Reset behavior
Depends on control condition; accessible booklet does not print separate reset paragraph.
Safety Critical
Immediate concern
Deeper detail available
The manufacturer has pushed full per-code troubleshooting trees into the Rheem Contractor App (QR code on equipment). Use the app for subcode detail beyond what's shown here.
Source
Rheem RDFXYC Installation Instructions fault table